Identification of sustainable deformation localization zones by non-destructive test parameters

• Autor: Ababkov, Nikolay ; Smirnov, Alexander
• Panin, Victor E ; Fomin, Vasily M
• Assuntos: Acoustic attenuation ; Acoustic noise ; Acoustics ; Attenuation coefficients ; Deformation ; Deformation effects ; Delay time ; Heat resistant steels ; Nondestructive testing ; Parameter identification ; Plastic deformation ; Strain localization ; Structural steels ; Surface acoustic waves ; Wave attenuation
• É parte de: AIP Conference Proceedings, 2020, Vol.2310 (1)
• Descrição: The possibility of identifying zones of localized deformation by the spectral-acoustic method of non-destructive testing in structural and heat-resistant steels is shown in the paper. The values of such parameters as the delay time of a surface acoustic wave, the attenuation coefficient, the amplitude of the received signal, and the intensity of magnetic noise in the zones of strain localization are established for all the specimens studied. The results of the analysis of the microstructure, mechanical and acoustic characteristics of the metal of heat power equipment after long-term operation, made of structural steels in areas of plastic deformation localization, are presented. Specimens of 0.2C steel and 0.12C-1Cr-1Mo-1V steel were investigated in the initial state, as well as after operation for 219 and 360 thousand hours, respectively. It has been established that the structural-phase state in the zones of localization of deformations has a direct effect on the characteristics of non-destructive tests.
  
• Editor: Melville: American Institute of Physics
  
• Idioma: Inglês